本题目来源于试卷: Half-life and decay constant，类别为 美国物理杯赛(Physics Bowl)
[单选题]
04.06: Radon gas emits gamma rays and is used in hospitals to treat cancere+p43 ueoa3g wa bm70l. Ioj.w,k48onzwt 9x ezu0 5d4qr ts half-life is about 3.8 days. Starting with a pure sample of radon, the percentage left after 4k, 05t4wq u.od ozr9 n8jxwez19 days will be about
A. 0 %
B. 3 %
C. 5 %
D. 9 %
E. 20 %
参考答案: B
本题详细解析:
暂无
| 
